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Cell["Linear Algebra", "Title",
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Cell["Assignment #5", "Title",
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Cell[TextData["Theory"], "Section",
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Cell[TextData["A Brief Introduction to Determinants"], "Subsection",
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  ": If A is any square matrix, then \n       A is singular        if and \
only if    det(A)=",
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  "\n Equivalently,\n       A is nonsingular  if and only if    det(A) is not \
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